The speed is what's impressive. One can build a structure in California for a similar price.<p>It seems people often over estimate the hard costs of construction in the first world. It's cheaper than people think.<p>In 2005, at the height of the building boom (labor was scarce) in Southern California, I built a 400 sq ft detached garage: Stucco, rolled composite roof, concrete slab, drywall, swiss coffee interior paint, garage door, and 30R insulation in the ceiling (well insulated).<p>Using all contracted labor.<p>Total cost: $5,500.<p>IOW, not much more than this 3D printed house. Building a house in 2.4 hours is the impressive part.